Aerial estimation of the size of gull breeding colonies

Journal of Wildlife Management

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Abstract

Counts on photographs and visual estimates of the numbers of territorial gulls are usually reliable indicators of the number of gull nests, but single visual estimates are not adequate to measure the number of nests in individual colonies. To properly interpret gull counts requires that several islands with known numbers of nests be photographed to establish the ratio of gulls to nests applicable for a given local census. Visual estimates are adequate to determine total breeding gull numbers by regions. Neither visual estimates nor photography will reliably detect annual changes of less than about 2.5 percent.

Additional publication details

Publication type:

Article

Publication Subtype:

Journal Article

Title:

Aerial estimation of the size of gull breeding colonies

Series title:

Journal of Wildlife Management

Volume:

32

Issue:

2

Year Published:

1968

Language:

English

Contributing office(s):

Patuxent Wildlife Research Center

Description:

287-293

Larger Work Type:

Article

Larger Work Subtype:

Journal Article

Larger Work Title:

Journal of Wildlife Management

First page:

287

Last page:

293

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